ApostropheCMS sanitize-html: SMIL animation namespace-prefix bypass allows javascript: URI injection (XSS)

影響: npm:sanitize-html >= 2.17.7, < 2.18.0 → 2.18.0

sanitize-html 2.17.7 introduced animatesUrlAttribute() to block SVG animation elements (animate, animateColor, animateMotion, animateTransform, set) when their attributeName targets a URL sink like href. However, this check is bypassed when the animation element uses a namespace prefix (e.g., svg:animate instead of animate). Root Cause The animatesUrlAttribute function (index.js, line ~832) checks svgAnimationTags.indexOf(name.toLowerCase()), where svgAnimationTags contains bare local n…

Read on GitHub Advisory Database

On 10/21/2026, 03:21 AM, GitHub Advisory Database published "ApostropheCMS sanitize-html: SMIL animation namespace-prefix bypass allows javascript: URI injection (XSS)" (type: Advisory). Severity is "Low" (low). Related technologies: JavaScript / Node.js. CVE: CVE-2026-113657.